summary
● Zener diodes are designed to operate at voltages greater than the breakdown voltage (peak reverse voltage).
● The breakdown voltage of a zener diode is deter- mined by the resistivity of the diode.
● Zener diodes are manufactured with a specific breakdown (zener) voltage.
● Power dissipation of a zener diode is based on temperature and lead lengths.
● Zener diodes are packaged the same as P–N junction diodes.
● Zener diodes with a breakdown voltage greater than 5 V have a positive zener voltage- temperature coefficient.
● Zener diodes with a breakdown voltage less than 4 V have a negative zener voltage temperature coefficient.
● Zener diodes are used to stabilize or regulate voltage.
● Zener diode regulators provide a constant output voltage despite changes in the input voltage or output current.
● Zener diodes can be tested for opens, shorts, or leakage with an ohmmeter.
● To determine whether a zener diode is regulat- ing at the proper voltage, a regulation test must be performed.
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